Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMDESCRIPTION AND OPERATION
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Starting System: Description and Operation
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Description and Operation
STARTING SYSTEM
System Description
Power is supplied at all times
- through 40 A fusible link (letter F, located in the fuse and fusible link block)
- to ignition switch terminal 1,
- through 15 A fuse (No. 78, located in the IPDM E/R)
- to CPU of IPDM E/R,
- through 10 A fuse (No. 71, located in the IPDM E/R)
- to CPU of IPDM E/R.
When the selector lever in the P or N position, power is supplied
- from TCM, and through A/T assembly terminal 9
- to IPDM E/R terminal 53.
Ground is supplied
- to IPDM E/R terminals 38, 50 and 60
- from grounds E21, E50 and E51.
With the ignition switch in the START position, and provided that the IPDM E/R receives a starter relay ON signal from the CAN lines, the IPDM E/R is energized and power is supplied
- from ignition switch terminal 5
- to IPDM E/R terminal 4 and
- through IPDM E/R terminal 3
- to starter motor terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the engine starts.
System Description
Power is supplied at all times
- through 40 A fusible link (letter F, located in the fuse and fusible link block)
- to ignition switch terminal 1,
- through 15 A fuse (No. 78, located in the IPDM E/R)
- to CPU of IPDM E/R,
- through 10 A fuse (No. 71, located in the IPDM E/R)
- to CPU of IPDM E/R.
When the selector lever in the P or N position, power is supplied
- from TCM, and through A/T assembly terminal 9
- to IPDM E/R terminal 53.
Ground is supplied
- to IPDM E/R terminals 38, 50 and 60
- from grounds E21, E50 and E51.
With the ignition switch in the START position, and provided that the IPDM E/R receives a starter relay ON signal from the CAN lines, the IPDM E/R is energized and power is supplied
- from ignition switch terminal 5
- to IPDM E/R terminal 4 and
- through IPDM E/R terminal 3
- to starter motor terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the engine starts.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.